Sound KS3

The picture shows 4 sound waves on an oscilloscope. Which has the highest pitch?

• A

• B

• C

• D

The picture shows 4 sound waves on an oscilloscope. What can you say about A?

• It is a very low pitched sound

• It is a very high pitched sound

• It is a very quiet sound

• It is a very loud sound

The picture shows 4 sound waves on an oscilloscope. Which 2 have the smallest amplitude?

• A

• B

• C

• D

Which statement is true of sound waves. Select 2 answers.

• They are made by objects vibrating

• They are detected because they make our ear drum vibrate

• They are transverse waves

• They travel faster in air than in water.

What is the height of a wave called?

• Peak

• Wavelength

• Amplitude

• Frequency

Sound waves are caused by the ____________ of particles

The distance between 2 peaks or troughs

• wavelength

• amplitude

• frequency

• wave speed

All waves can be reflected

• true

• false

After the train passed, the pitch of the train whistle became lower. This change in sound would be represented by what change in the diagram above? 

• The distance represented by C would increase. 
• The distance represented by C would decrease. 
• The distance represented by D would increase. 
• The distance represented by D would decrease. 

The speed of sound is about...

• 30 m/s

• 300 m/s

• 30 000 m/s

• 300 00 0m/s